QAL 991 Particulate Monitor


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The PCME QAL 991 is an approved Particulate CEM (Continuous Emission Monitor) designed to meet and exceed CEN standard EN 14181 / EN 13284-2. It's particularly suited to monitoring emissions from industrial processes regulated under the WID and LCPD. 

The PCME QAL 991 is also proven in other industrial processes controlled with high efficiency bag filtration. The instrument holds QAL1 approval specified in EN 15267-3, under both MCERTS and TUV.

Product Description


PCME's patented ElectroDynamic Probe Electrification technology extracts a specific frequency band from the induced AC current signature and filters out the DC current caused by particle collisions. The technology outperforms conventional DC triboelectric systems and alternative AC systems by extending the velocity range over which the instrument has no cross sensitivity to changing velocity, and is unaffected by contamination of the sensor rod, eliminating concerns of signal drift.

  • System self-checks, with logging of Zero and Span check data for QAL3 reporting and probe rod short circuit check to detect (hence avoid) electrical shorting to the stack
  • QAL Reporter PC software option to provide secure and powerful emissions reporting and automated QAL3 reporting in full compliance with EN 13284-2
  • Entry and Standard control units with advanced graphics and user interface screens, features including alarming, graphical trending, data logging, 4-20mA output.
  • PLUS control unit option for sensor networking (up to 16 sensor channels) via industry standard Modbus, multiple inputs for external devices (e.g. for Temp and O2 normalisation)

The PCME QAL 991 supersedes the DT991, an instrument proven in demanding CEM applications worldwide


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View FileQAL 991 Datasheet
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